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  4. Reasons for maintenance of barrel screw ...

Reasons for maintenance of barrel screw of cone double extruder

Reasons for maintenance of barrel screw of cone double extruder

The barrel screw of the cone double extruder has its unique large feeding area, large compression ratio, the shear and mixing efficiency of the screw in the longitudinal and transverse directions of the material is higher, and the plasticizing ability is more excellent, so it is especially suitable for High calcium filled PVC powder is used as raw material to produce plastic profiled products.
   The barrel screw of the conical twin-screw extruder encountered poor service life due to the high productivity of the extruder.
1. The inorganic calcium carbonate with a large particle size and high hardness is even added at a ratio of 150%. Recycled plastic mixed with many impurities is also often used as the main raw material.. The barrel and screw are in contact with these materials. Unsustainable in solid-phase friction;
2. In order to obtain more superior plasticizing ability, the material is pushed to the smaller extruding end by the large inlet of the extruder designed by the supercone, which further exacerbates this solid-phase friction, resulting in the small hole end of the barrel and The wear of the small diameter section of the screw is particularly serious; because the back pressure of the screw is greater than that of the ordinary single screw extruder and parallel twin screw extruder;
   3. The corrosion of chloride ions released in the plasticizing process on the barrel screw, etc... These are indispensable factors that lead to a more severe service life of the core components of the conical twin screw extruder.

If you want to know more about it please do not hesitate to contact me. WhatsApp:+86-15966835076.


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